Meet the Ice Age Giants

"A Mastodon is a very close relative of a mammoth so it’s another
one of the elephant family. They look very similar to mammoths in that they
have trunks and tusks. I can tell them apart if you show me their teeth
because they are very, very different from mammoth teeth. Mammoth molars
have this great big series of ridges along them and they’re designed for
eating grass whereas Mastodons are browsers (they eat leaves) and their
teeth are correspondingly different."